We will tell you what is true. You can form your own view.

Its appearance comes as other high-tech companies such as Facebook and Pinterest tackle anti-vaccine content on their platforms. Twitter said Dorsey was not aware of the controversial views of the host.

A spokesman for Twitter said L & # 39; Independent that Mr. Dorsey was unaware of Mr. Greenfield's opinion about the vaccinations and that his appearance on the podcast did not validate these beliefs.

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1/7 Charlie Sheen

Sheen has waged a legal battle against his wife Denise Richards to prevent her from vaccinating their children. Richards obviously won and Sheen would have been so bitter that he would have fully paid the pediatricians' nickel bill.

2/7 Gwyneth Paltrow

3/7 Rob Schneider

Schneider falsely claimed that the US Supreme Court had ruled vaccines "inevitably dangerous" and demanded the freedom to refuse vaccination

Getty

4/7 Jenny McCarthy

McCarthy claimed that "people were dying of vaccination", thought that his son had caught autism through a vaccine and had publicly expressed his opinion on the subject for many years.

AFP / Getty

5/7 Bill Maher

Maher has long been arguing against vaccines claiming the flu vaccine was the worst thing to do at Larry King. His position seems to come from a mistrust towards the government

AFP / Getty

6/7 Alicia Silverstone

In Silverstone's book, The Kind Mama, she writes that "there is growing anecdotal evidence from doctors who have received scary phone calls from parents claiming that their child was" never the same "after receiving a vaccine".

Getty

7/7 Andrew Wakefield

Patron of the anti-vax movement, the disgraced physician Andrew Wakefield published in 1998 an article in the Lancet medical journal, claiming a link between the MMR vaccine and autism.

Pennsylvania

1/7 Charlie Sheen

Sheen has waged a legal battle against his wife Denise Richards to prevent her from vaccinating their children. Richards obviously won and Sheen would have been so bitter that he would have fully paid the pediatricians' nickel bill.

2/7 Gwyneth Paltrow

3/7 Rob Schneider

Schneider falsely claimed that the US Supreme Court had ruled vaccines "inevitably dangerous" and demanded the freedom to refuse vaccination

Getty

4/7 Jenny McCarthy

McCarthy claimed that "people were dying of vaccination", thought that his son had caught autism through a vaccine and had publicly expressed his opinion on the subject for many years.

AFP / Getty

5/7 Bill Maher

Maher has long been arguing against vaccines claiming the flu vaccine was the worst thing to do at Larry King. His position seems to come from a mistrust towards the government

AFP / Getty

6/7 Alicia Silverstone

In Silverstone's book, The Kind Mama, she writes that "there is growing anecdotal evidence from doctors who have received scary phone calls from parents claiming that their child was" never the same "after receiving a vaccine".

Getty

7/7 Andrew Wakefield

Patron of the anti-vax movement, the disgraced physician Andrew Wakefield published in 1998 an article in the Lancet medical journal, claiming a link between the MMR vaccine and autism.

Pennsylvania

The spokesman mentioned Twitter's advertising policy, which concerns the promotion of controversial health content. Advertisements regarding vaccination could potentially be subject to several policies, including one that states that any claim for treatment, treatment, diagnosis or prevention of certain diseases is restricted.

On Wednesday, Greenfield published another vaccine-related tweet, repeating unsupported claims that vaccinations could be harmful.

He said: "I am not against vaccinations. They saved a lot of lives. I have been vaccinated. My children have been vaccinated. But I also think that we have to pay attention to possible adverse health effects. I rarely visit the subject and I had no idea before knowing how much this question was billed. "

In his Twitter biography, Mr. Greenfield writes, "Athlete, father, entrepreneur, write and talk about health, longevity, fitness, and nutrition." He has more than 70,000 followers.

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Twitter and Facebook have been repeatedly accused of providing a platform for spreading anti-vaccine propaganda, as well as any other misinformation.

Disinformation campaigns from the anti-vax movement have become so serious that diseases such as measles are making a comeback in countries where they have almost been eliminated.

In the United States, health officials have declared a public health emergency in Washington State as a result of an outbreak of the disease.

"The reasons for this increase are complex and not all of these cases are due to vaccine hesitancy," the World Health Organization said in January, while calling the anti-vaccine movement One of the worst threats to the health of humanity in 2019.

Since then, Facebook has taken steps to prevent anti-vaccine content from appearing on its social network by reducing the ranking of groups and pages that propagate erroneous information.

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"If these hoaxes of vaccines appear on Facebook, we will act against them," wrote Monika Bickert, head of global politics at the company, in a blog post earlier this month.

"We are exploring ways to give people more accurate information from Vaccine Specialist Organizations, at the top of the associated research findings, in pages dealing with the topic and on invitations to join groups on the topic. "